GAIN
The output level of the camera is determined by the
GAIN
controls. The gain can be in one of three modes:
MAN,
AUTO, or AUTO EE
.
MAN GAIN
When the
GAIN
switch is in the
MAN
position, the
output level of the camera is determined by the rear
panel
GAIN
pot located above the
GAIN
switch. This pot
has a range of about 20db.
AUTO GAIN
The camera senses the output video level and adjusts
the gain to maintain a full level signal when the
GAIN
switch is in the
AUTO
position. This position ensures
that the camera is providing a nominal output, but it is
not useful in applications where quantitative
measurements are needed. In those instances, the camera
should be in the
MAN
gain position.
AUTO EE
This gain position allows the camera to use the full
range of its automatics in the quest of providing a
standard output signal level. In addition to the use of the
automatic gain controls, the
AUTO EE
mode uses the
Electronic Exposure capabilities of the camera to
increase the dynamic range of the CCD. By shuttering
the CCD off for a portion of the video period, the camera
is capable of providing images under enormous light
differences. The camera can shutter down to 1/50,000
sec.
